<template>
  <div class="login_container">
    <div class="card-container">
      <div class="card">应有尽有电商管理系统</div>
    </div>
    <div class="login_box animate__animated animate__fadeInRight">
      <!-- 登录头像 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录表单区域 -->
      <el-form
        ref="loginFormRef"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
        :model="loginForm"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
            placeholder="username"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            placeholder="password"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import 'animate.css'
export default {
  data() {
    return {
      /* 登录表单的数据绑定对象 */
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          { required: true, message: '请输入username', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入password', trigger: 'blur' },
          { min: 6, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        /* 将登录后的token 保存到客户端的sessionStorage */
        window.sessionStorage.setItem('token', res.data.token)
        /* 通过编程式导航跳转到后台主页‘/home’ */
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-image: url(../assets/loginBackground.jpeg);
  background-size: 100%;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 5px;
  position: absolute;
  /* 居中 */
  right: 300px;
  top: 0;
  bottom: 0;
  margin: auto;

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 0;
    right: 0;
    margin: -18% auto;
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}

@property --rotate {
  syntax: '<angle>';
  initial-value: 132deg;
  inherits: false;
}

.card-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  flex-direction: column;
  padding-top: 2rem;
  padding-bottom: 2rem;
  box-sizing: border-box;
}

.card {
  background: #191c29;
  width: auto;
  height: 30px;
  padding: 3px;
  position: relative;
  border-radius: 6px;
  justify-content: center;
  align-items: center;
  text-align: center;
  display: flex;
  font-size: 1.5em;
  color: rgb(88 199 250 / 0%);
  cursor: pointer;
  font-family: cursive;
  z-index: 2;
}
.card::before {
  content: '';
  width: 104%;
  height: 102%;
  border-radius: 8px;
  background-image: linear-gradient(
    var(--rotate),
    #5ddcff,
    #3c67e3 43%,
    #4e00c2
  );
  position: absolute;
  z-index: -1;
  top: -1%;
  left: -2%;
  animation: spin 2.5s linear infinite;
}
@keyframes spin {
  0% {
    --rotate: 0deg;
  }
  100% {
    --rotate: 360deg;
  }
}
</style>
